Very much still involved in motorsport, as he still races in historic events, and visits them frequently. Was, until the late 2000's, an engineer in US single-seaters. Was also a driver coach and spotter for the Super Aguri Fernandez Racing IRL team. His son, of the same name, worked alongside John with the team, as a mechanic, but was tragically killed in 2004. Martin's best discipline was sports car road racing, and he converted his own car to become SCCA National Champion in 1964. Martin, who was based either in Wisconsin or Illinois, also raced in Trans Am and F5000.